Electric Avenue 72-43713 Bluetooth Speakerphone - Car Kit - Connect Up To 2 Phones Features include: Bluetooth specifications: Version 1.2, Class 2Operating frequency band: 1.4  2.48 GHz Rechargeable polymer battery: 3.7V DC, 850mAhNormal charge time (approx.): 8-10 hrs. Talk time: 10-12 Hours Multimedia function supports A2DPCan connect two Bluetooth devices simultaneously USB cable can connect to the supplied car charger adapter or your computer for charging.